refactor: Take impl BlockStore instead of &impl BlockStore in general

[matheus23]

Also:

• Remove async_trait
• Expose blanket impl<C: Cache> Cache for &C and Box<C>
• Move the trait module to cache
• Remove has_block from trait Cache
• Add a blockstore wrapper utility CacheMissing under the quick_cache feature

[codecov]

Codecov Report

Attention: 54 lines in your changes are missing coverage. Please review.

Comparison is base (3067020) 48.39% compared to head (0b024ff) 53.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #40      +/-   ##
==========================================
+ Coverage   48.39%   53.13%   +4.73%     
==========================================
  Files          12       12              
  Lines         560      559       -1     
  Branches      268      249      -19     
==========================================
+ Hits          271      297      +26     
+ Misses         69       59      -10     
+ Partials      220      203      -17     

Files	Coverage Δ
car-mirror/src/lib.rs	100.00% <ø> (ø)
car-mirror/src/pull.rs	68.42% <100.00%> (ø)
car-mirror/src/push.rs	68.42% <100.00%> (ø)
car-mirror/src/test_utils/local_utils.rs	43.90% <0.00%> (+1.40%)	⬆️
car-mirror/src/incremental_verification.rs	53.57% <44.44%> (+7.57%)	⬆️
car-mirror/src/common.rs	56.54% <45.00%> (+2.73%)	⬆️
car-mirror/src/dag_walk.rs	42.59% <43.33%> (+3.56%)	⬆️
car-mirror/src/cache.rs	58.33% <58.33%> (ø)

... and 1 file with indirect coverage changes